On February 13, 2017, Jeremy revealed concept art for it and its title, noting that it is "coming soon."[3] However, later information from the official Miraculous Twitter account states that the crossover may not involve Ghostforce.[4]

On October 19, 2019, ON Animation Studios and Method Animation announced that they were looking for crew members to help create storyboards for the latest special episode. It was added at the time that it would be a new 52-minute episode set in New York City and titled "Miraculous New York".[1]

On March 20, 2020, Thomas Astruc said that despite the coronavirus epidemic they are still working on special and revealed a new character.[5]

One day later, on March 21, Thomas Astruc posted on his Twitter a few seconds of animation with a new character that will appear in Miraculous New York special.[6]Feri González confirmed that's Sparrow, one of New York superheroes.[7]

On March 22, 2020, Thomas Astruc posted piece of a model of a new female character and added that she is his favorite future character.[8] It was unknown where or when she will appear, until Wilfried Pain confirmed that she would be in this episode.[9]